Add Canvas to JApplet

Hello.

I am trying to add a canvas to a JApplet, the canvas will be the only thing placed in the applet. I have set its dimensions to 800x600 and done the same for the JApplet window. In times past when I've made java applications, I used a JFrame and placed the canvas into its getContentPane().

This method does not seem to work with a JApplet as the Canvas is not being drawn.

My idea is that the applet is already very similar to a Canvas. Is there a way I can represent the draw space of the JApplet as a Canvas? That would make more sense instead of adding another Canvas on top of the applet content pane.

Canvas is an AWT component and trying to add it to a Swing GUI is asking for trouble. If you absolutely need to display a Canvas, why not show it in an Applet and not a JApplet?

Well future implementations of this will be used with extra JPanels, and so using swing JApplet is a better idea.

I've had no trouble in any circumstance using a Canvas within swing components. Also, aren't all swing components extensions of awt components... and thus compatible with each other?

Since you say there's a problem in using one, is there an alternate to using a Canvas? Something that has the same functionality obviously.

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Originally Posted by coiner

Well future implementations of this will be used with extra JPanels, and so using swing JApplet is a better idea.

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Then prepare for side effects like you're experiencing if you add AWT components.

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I've had no trouble in any circumstance using a Canvas within swing components. Also, aren't all swing components extensions of awt components... and thus compatible with each other?

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Yes and no. Swing is built on top of AWT but AWT uses heavy weight components -- components that are created by the native OS, while Swing for the most part uses light-weight components -- components that are created by Swing code itself, and so mixing will often cause these problems. The exceptions are some root containers such as JFrame.

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Since you say there's a problem in using one, is there an alternate to using a Canvas? Something that has the same functionality obviously.

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The obvious answer is to move up to a JPanel right now.

Much luck!

I will experiment using JPanel as Canvas. Thanks for advice.

You're welcome. By the way, what are you doing with that Canvas? Is it displaying an image? A GUI? Both?

Oh, and welcome to the forum!

I am converting a desktop game I created to applet. In the original, I create a Canvas and BufferStrategy. This loops to create Java2D animation.

Got it. Best of luck with it.